Upgrading graphics/mupdf from 1.13 to 1.14 fails after too much errors:

[...]
mkdir -p build/release/source/fitz/ ; cc -O2 -pipe -march=nocona  -fstack-protector -fno-strict-aliasing  -ffunction-sections -fdata-sections -DNDEBUG -fomit-frame-pointer -I/usr/ports/graphics/mupdf/work/mupdf-1.14.0-source/include/mupdf -fPIC -Iinclude -MMD -MP -o build/release/source/fitz/load-png.o -c source/fitz/load-png.c -Wall -Wdeclaration-after-statement -I/usr/local/include/freetype2  -I/usr/local/include/harfbuzz -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include  -I/usr/local/include  -DSHARE_JPEG -Ithirdparty/lcms2/include -Ithirdparty/mujs   -I/usr/local/include/openjpeg-2.3 
source/fitz/load-jpx.c:491:2: error: unknown type name 'OPJ_SIZE_T'
        OPJ_SIZE_T size;
        ^
source/fitz/load-jpx.c:492:2: error: unknown type name 'OPJ_SIZE_T'
        OPJ_SIZE_T pos;
        ^
source/fitz/load-jpx.c:641:8: error: unknown type name 'OPJ_SIZE_T'
static OPJ_SIZE_T fz_opj_stream_read(void * p_buffer, OPJ_SIZE_T p_nb_by...
       ^
source/fitz/load-jpx.c:641:55: error: unknown type name 'OPJ_SIZE_T'
static OPJ_SIZE_T fz_opj_stream_read(void * p_buffer, OPJ_SIZE_T p_nb_by...
                                                      ^
source/fitz/load-jpx.c:644:2: error: use of undeclared identifier 'OPJ_SIZE_T'
        OPJ_SIZE_T len;
        ^
source/fitz/load-jpx.c:646:2: error: use of undeclared identifier 'len'
        len = sb->size - sb->pos;
        ^
source/fitz/load-jpx.c:647:6: error: use of undeclared identifier 'len'
        if (len == 0)
            ^
source/fitz/load-jpx.c:648:11: error: use of undeclared identifier 'OPJ_SIZE_T'
                return (OPJ_SIZE_T)-1; /* End of file! */
                        ^
source/fitz/load-jpx.c:649:6: error: use of undeclared identifier 'len'
        if (len > p_nb_bytes)
            ^
source/fitz/load-jpx.c:650:3: error: use of undeclared identifier 'len'
                len = p_nb_bytes;
                ^
source/fitz/load-jpx.c:651:39: error: use of undeclared identifier 'len'
        memcpy(p_buffer, sb->data + sb->pos, len);
                                             ^
source/fitz/load-jpx.c:652:13: error: use of undeclared identifier 'len'
        sb->pos += len;
                   ^
source/fitz/load-jpx.c:653:9: error: use of undeclared identifier 'len'
        return len;
               ^
source/fitz/load-jpx.c:656:8: error: unknown type name 'OPJ_OFF_T'
static OPJ_OFF_T fz_opj_stream_skip(OPJ_OFF_T skip, void * p_user_data)
       ^
source/fitz/load-jpx.c:656:37: error: unknown type name 'OPJ_OFF_T'
static OPJ_OFF_T fz_opj_stream_skip(OPJ_OFF_T skip, void * p_user_data)
                       source/fitz/load-jpx.c:660:14: error: use of undeclared identifier 'OPJ_OFF_T'
        if (skip > (OPJ_OFF_T)(sb->size - sb->pos))
                    ^
source/fitz/load-jpx.c:661:11: error: use of undeclared identifier 'OPJ_OFF_T'
                skip = (OPJ_OFF_T)(sb->size - sb->pos);
                        ^
source/fitz/load-jpx.c:666:8: error: unknown type name 'OPJ_BOOL'
static OPJ_BOOL fz_opj_stream_seek(OPJ_OFF_T seek_pos, void * p_user_data)
       ^
source/fitz/load-jpx.c:666:36: error: unknown type name 'OPJ_OFF_T'
static OPJ_BOOL fz_opj_stream_seek(OPJ_OFF_T seek_pos, void * p_user_data)
                                   ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
gmake[2]: *** [Makefile:101: build/release/source/fitz/load-jpx.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
gmake[2]: Leaving directory '/usr/ports/graphics/mupdf/work/mupdf-1.14.0-source'
===> Compilation failed unexpectedly.
[...]

My uname -a: FreeBSD yokozuna 12.0-STABLE FreeBSD 12.0-STABLE r343805 YOKOZUNA  amd64